Experience has shown that the best way to provide efficient and budget-wise testing is to perform a High-Voltage sweep on the entire roofing assembly, then perform Low-Voltage Vector Mapping.

By performing the HV test first we find most or all of the puncture type anomalies which may or may not be evident to the naked eye. The HV test is a dry test and makes patches and repairs easy to accomplish.

The LV Vector Mapping test finds less obvious anomalies such as debris under membrane edges, cold joints, open T-Seams, migratory leaks, etc. Repairs from the HV test are also retested  during the Vector Mapping. By performing both tests in this sequence we can test much larger areas in less time and test them much more effectively.